Running a pump dry is never a good idea, even as a method of preventing a flood. While many modern pumps have thermal protection to trip power when they run dry or overheat, you're still risking a fire. Your hardwood floors won't get warped, but the house could burn down. So good call on some sort of float switch to cut power as a safety measure.
Last edited by mike31154; 07-17-2012 at 03:19 PM.
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